“It is concerning that the Zionist regime [of Israel] … is not a member of any treaty on the prohibition of weapons of mass destruction including the Chemical Weapons Convention,” said a spokeswoman for Iran’s Foreign Ministry at the time.

The Arab League has unsuccessfully tried to convince the U.S. and European nations to join a campaign to end Israel’s policy of nuclear ambiguity. It has, however, seen some support at the United Nations. A UN resolution passed in 2010 called for a nuclear-free Middle East and singled out Israel for criticism, while ignoring Iran, whose former President Mahmoud Ahmadinejad constantly threatened to wipe Israel off the map.